v3.0.1

Changes

• Pass transition hook's arguments correctly (#4123 by @arkist)
• Fix index routes inside async pathless routes (#4147 by @taurose)
• 'to' maybe undefined (#4216 by @panzj)
• Fix withRouter error when used without a Router (#4295 by @dropfen)
• Adding support for escaped parentheses in Route Paths (#4202 by @sebastiandeutsch)